Dickinson v Motor Vehicle Insurance Trust

In *Dickinson v Motor Vehicle Insurance Trust*, the High Court of Australia considered an appeal from a decision of the Supreme Court of Western Australia concerning a claim for damages for personal injuries. The appellant, Ms. Dickinson, had suffered injuries in a motor vehicle accident and sought to recover damages from the respondent, the Motor Vehicle Insurance Trust, which was the statutory insurer under Western Australian legislation. The core of the dispute revolved around the assessment of Ms. Dickinson's damages, specifically the extent to which her pre-existing conditions should be taken into account in determining the compensation payable for the injuries sustained in the accident.

The High Court was required to determine whether the Supreme Court had erred in its assessment of damages by failing to adequately consider the impact of Ms. Dickinson's pre-existing degenerative spinal condition on her capacity to earn a living. The central legal issue was how to apportion the loss of earning capacity between the injuries caused by the accident and the pre-existing condition, and whether the trial judge had applied the correct legal principles in making this apportionment.

The Court reasoned that where a plaintiff suffers from a pre-existing condition that is aggravated or exacerbated by an injury, the defendant is liable for the aggravation or exacerbation only, not for the pre-existing condition itself. However, the Court also held that if the pre-existing condition significantly reduces the plaintiff's earning capacity, this must be taken into account when assessing the damages for the loss of earning capacity caused by the injury. The Court found that the trial judge had failed to properly consider the extent to which Ms. Dickinson's pre-existing condition had already limited her earning capacity, and that this failure led to an overestimation of the damages attributable to the accident.

The High Court allowed the appeal, setting aside the order of the Supreme Court and remitting the matter back to the Supreme Court for a reassessment of damages in accordance with the principles laid down by the High Court.